Eversource Energy is again taking aerial photos of power lines in the region and residents may see a low flying helicopter over the next few days.  The surveillance work is being done in Bethel, Brookfield, New Milford, Weston and Wilton among other municipalities.  Weather permitting, the helicopter will be used between 7am and dusk.  Police in those towns have been informed that a black helicopter with red lettering will be flying lower to the ground than is usual.